whinning sound posted by irdhp on April 17, 2014 at 09:39 PM
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I had a simular sound on mine that turned out to be a bad front bearing in my rear diff. Eventually it got louder and louder until after running around 150MPH for a little while on a road trip it was VERY loud durring all driving conditions. I swapped with a used rear end from Z1 and now its nice and quiet.